Finding the Fourth Proportional to 2,870.18, 3,962.16 and 2,206.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.18 : 3,962.16 = 2,206.80 : x
2. Step 2: Convert to fraction form
   2,870.18/3,962.16 = 2,206.80/x
3. Step 3: Cross multiply
   2,870.18x = 3,962.16 × 2,206.80
4. Step 4: Simplify right side
   2,870.18x = 8,743,694.69
5. Step 5: Solve for x
   x = 8,743,694.69/2,870.18
6. Step 6: Final answer
   x = 3,046.39